1. Bachman, C.W., Daya, M.: The role concept in data models. In: International Conference on Very Large Data Bases, pp. 464–476. VLDB Endowment (1977)
2. Lecture Notes in Computer Science;A Bloesch,1996
3. Lecture Notes in Computer Science;L Chen,2014
4. Götz, S., Richly, S., Aßmann, U.: Role-based object-relational co-evolution. In: Proceedings of 8th Workshop on Reflection, AOP and Meta-Data for Software Evolution (RAM-SE 2011) (2011)
5. Guarino, N., Carrara, M., Giaretta, P.: An ontology of meta-level categories. In: Principles of Knowledge Representation and Reasoning: Proceedings of the Fourth International Conference, pp. 270–280. Morgan Kaufmann (1994)